Patient Refusal of CT Scan and Legal Responsibilities

A nurse is caring for a patient who has just been admitted to the hospital with severe abdominal pain. The physician has ordered a series of diagnostic tests, including a CT scan. The patient, however, expresses concern about the radiation exposure associated with the CT scan and refuses the test. As the nurse, you understand the importance of the test in diagnosing the patient's condition.

What is the most appropriate action for you to take in this situation while considering your legal responsibilities?